| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:async'; |
| import 'dart:io'; |
| |
| import 'package:dds/dds.dart'; |
| import 'package:dds_service_extensions/dds_service_extensions.dart'; |
| import 'package:test/test.dart'; |
| import 'package:vm_service/vm_service_io.dart'; |
| import 'common/test_helper.dart'; |
| |
| // Regression test for https://github.com/flutter/devtools/issues/3302. |
| |
| void main() { |
| late Process process; |
| late DartDevelopmentService dds; |
| |
| setUp(() async { |
| process = await spawnDartProcess( |
| 'smoke.dart', |
| ); |
| }); |
| |
| tearDown(() async { |
| await dds.shutdown(); |
| process.kill(); |
| }); |
| |
| test( |
| 'Ensure various historical streams can be cancelled without throwing StateError', |
| () async { |
| dds = await DartDevelopmentService.startDartDevelopmentService( |
| remoteVmServiceUri, |
| ); |
| expect(dds.isRunning, true); |
| final service = await vmServiceConnectUri(dds.wsUri.toString()); |
| |
| // This creates two single-subscription streams which are backed by a |
| // broadcast stream. |
| final stream1 = service.onExtensionEventWithHistory; |
| final stream2 = service.onExtensionEventWithHistory; |
| |
| // Subscribe to each stream so `cancel()` doesn't hang. |
| final sub1 = stream1.listen((_) => null); |
| final sub2 = stream2.listen((_) => null); |
| |
| // Give some time for the streams to get setup. |
| await Future.delayed(const Duration(seconds: 1)); |
| |
| // The second call to `cancel()` shouldn't cause an exception to be thrown |
| // when we try to cancel the underlying broadcast stream again. |
| await sub1.cancel(); |
| await sub2.cancel(); |
| }, |
| timeout: Timeout.none, |
| ); |
| } |